Structure of the full-length yeast Arp7-Arp9 heterodimer

The crystal structure of a complex of full-length Arp7 and Arp9 was determined that shows that they form a heterodimer, in contrast to the monomeric units observed for other actin-related proteins. Therefore, the dimeric Arp7-Arp9 form that purportedly exists in the SWI/SNF and RSC chromatin-remodelling factors exists independently of the binding of other proteins in these megadalton complexes.